• Country
• United States of America (USA)

• Manufacturer / Brand
• Radio Products Manufacturing Co. (RPM); Chicago, IL

• Year
• 1923/1924

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 204096

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: RPM Mounted Variocoupler No. 104 - Radio Products Manufacturing

• Shape
• Chassis only or for «building in»

• Notes
• The Radio Products Manufacturing RPM No. 104 Mounted Variocoupler.

• Price in first year of sale
• 12.00 $

• Mentioned in
• Radio Merchandising, Oct. 1923, p.45

• Literature/Schematics (1)
• 1924 Central Electric Co. catalog page 38

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 23 models, 10 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radio Products Manufacturing Co. (RPM); Chicago, IL